Electric furnace.



E. STASSANO.

ELECTRIC FURNACE.

APPLICATION FILED 00115, 1913.

Patented Aug. 4, 1914.

' hand in order to regu ate the height of UNITED STATES PATENT oEEIoE;

ERNESTO STAS SANO, OF TURIN, ITALY.

ELECTRIC FURNACE.

To all whomit may concert.

Be it known that I, ERNESTO STASSANO, a subject of the King of Italy, residing at Turin, Italy, have invented certain new and useful Improvements in Electric Furnaces, of which the following is a specification.

This invention relates to tlie electric furnaces, particularly to the electric furnaces of the type described in my U. S. Patents Nos. 1,024,657 and 1,059,499, in: which the melting chamber being carried} by a universal suspension member or flexibly suspended from above so (that its axis is' capable of describing a cdne, a continuous or intermittent conicalmovement can be im parted to the said axiswith the result that the charge is.stirred u as would be in a rotary furnace ,while thg furnace is a merely oscillating one, and be for its object an improvement which consi ts in means that ermit the furnace cham er to be adjusted by its casting outlet or tap hole.

If the furnace chamber be arrested in a position wherein the tap hole or outlet is elevated so that the molten metal can not flow out until the tap hole is lowered, it is not easy, by aid of a motor, to regulate the rotation of the wheel that is at the base of the chamber and rocks the depending pivot of the chamber, so as to gradually lower 'the tap hole and to stop the rotation at any moment. This drawback is obviated by the present invention by adopting a hand control in place of the control by an electric motor when imparting to the said actuating wheel the small angular displacements necessary for bringing the tap hole into the de sired position.

In the accompanying drawing is shown, by way of example, one form of the invention as applied to a furnace suspended in the manner described in my U. S. Patent .No. 1,059,499, in which the chamber is carried bya universal suspension member so that its axis can describe a cone the apex of which is above said chamber.

Figure 1 shows diagrammatically the furnace with its chamber in a position in which the molten metal can not be releasedrl ig. 2 shows the hand control applied to the'same furnace and Fig. 3 is a detail of the controlling device.

, ":15 Specification of Letters Patent. Appli catiqn filed October 15,-1912.

Patented'Aug. 4,1914. semi No. 795,382.

As shown in Figs. 2 and 3, the'toothed wheel 18 meshing with the wheel 17, that effects by its rotation the rocking of the furnace chamber, is fixed to a shaft 19 which maybe actuated through gearing 20 by a shaft 21 operated directly by the electric motor 22.

According to the present invention on the shaft 21 is mounted to slide, but constrained to rotate with it, a'sleeve 23 whichcan be shifted by means of the forked member 24 carried by a bell-crank lever 25 which in turn can be operated, for example, by means of rod 26 and pedal 27.

The sleeve 23 is provided with a toothed wheel or pinion 28 which by 0 crating lever 25 can be made to mesh with a wheel 29 which can be turned with the aid of suitable gear 30 by hand wheel 31. Consequently while normally the lever 25 under the action of a spring as shown, or other suitable means", remains in the position represented in Fig. 3, the wheel 28 is out of gear with the wheel 29 and the furnace is rocked by means of motor 22. By )ressing on the pedal 27, wheel 28 is broug t into mesh with wheel 29 so that when the hand wheel 31 is turned a movement is transmitted to wheel 18 in gear with wheel 17 which directly oscillates the chamber. Supposing the chamber has been stopped in the position it has in Fig. 1, it is necessary merely to turn the hand wheel 31, while pressing on the pedal 27, in order to turn the chamber so as to lower gradually the tap hole. It will be understood that it is possible in this way to regulate the casting by lowering the tap hole to the extent necessary to allow the desired amount of metal to flow out.

\Vhat I claim is:

1. In an electric furnace with an oscillating melting chamber, means for imparting motion to the melting chamber by power and by hand at will, comprising a rotatable member controlling said chamber, a shaft .arranged to transmit rotation to the said member, a pinion sliding on said shaft for engaging a harid-controlled wheel, and

means for bringing said sliding pinion in engagement with the hand-c mrolled wheel.

2. In an electric furnace with an oscillating melting chamber, means for imparting motion to the melting chamber by power and by hand at will, comprising a rotatable member controlling said chniiilier, n shaft arranged to transmit rotation to the said member, a pinion siiding'on said shaft for engaging ii hand-controliod wheel, and a pedal lever for bringing said sliding pinion in engagement with the hand-controlled When In testimony whereof I afi'ix my signature in presence of two \VltIiOSSGS.

iilR-NESTO STASSANO.

Witnesses CARLO Ton'iux, C. S. Fm'nns. 

